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Mass Transfer

Mass Transfer
The film penetration model of mass transfer was enunciated by

Fick
Toor and Marchello
Stefan
Gilliland

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Mass Transfer
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

Decrease
Can either increase or decrease, depends on the system
Remain unchanged
Increase

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Mass Transfer
In case of constant underflow extraction operation, the __________ at all solute concentration.

Both A & B
Solids are drained to the same extent
Neither A nor B
Ratio of the insoluble to solution is constant

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Mass Transfer
Dry bulb temperature of the gas is __________ the wet bulb temperature.

More than
Equal to
None of these
Less than

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Mass Transfer
In the desorption of highly soluble gas from the liquid, the main resistance will be in the __________ phase.

Neither A nor B
Gas
Both A & B
Liquid

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

25
< 25
-25
> 25

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